I would start with fresh killed then try moving to f/t. You should feed him every 7-10 days (but some will only eat every other week) a meal that is 15% of his body weight (so a 100 gram snake should get 15 grams of rodent)

A cheap kitchen scale is all that's necessary for this. I got mine for $15



Making sure that you provide the right temperatures and humidity is the best way to make sure that your snake will eat.